one.line.df <- data.frame(
  x = c(1, 2, 3, 4), 
  y = c(2, 1, 3, 4), 
  array = c(0.1, 0.2, 0.1, 0.1), 
  arrayminus = c(0.2, 0.4, 1, 0.2)
)

test_that("only asymmetric error bars", {
  error.gg <- ggplot(one.line.df, aes(x, y)) +
    geom_errorbar(aes(ymin = y - arrayminus, ymax = y + array))
  L <- expect_doppelganger_built(error.gg, "error-simple")
})

test_that("asymmetric error bars, geom_errorbar last", {
  one.line.gg <- ggplot(one.line.df, aes(x, y)) +
    geom_line() +
    geom_point() +
    geom_errorbar(aes(ymin = y - arrayminus, ymax = y + array))
  L <- expect_doppelganger_built(one.line.gg, "error-simple-line")
})

test_that("asymmetric error bars, geom_errorbar first", {
  one.line.gg <- ggplot(one.line.df, aes(x, y)) +
    geom_errorbar(aes(ymin = y - arrayminus, ymax = y + array)) +
    geom_line() +
    geom_point()
  L <- expect_doppelganger_built(one.line.gg, "error-simple-line-point")
})

test_that("different colors for error bars, points, and lines", {
  one.line.gg <- ggplot(one.line.df, aes(x, y)) +
    geom_errorbar(aes(ymin = y - arrayminus, ymax = y + array), color = "red") +
    geom_line(color = "violet") +
    geom_point(color = "blue", size = 14)
  L <- expect_doppelganger_built(one.line.gg, "error-simple-line-point-crazy")
})

# example from https://github.com/ropensci/plotly/issues/513

d <- data.frame(
  x = 1:5, 
  y = 1:5, 
  label = letters[1:5], 
  group = factor(c('one', 'one', 'two', 'two', 'one'))
)
fig1 <- ggplot(d, aes(x = x, y = y, text = label, colour = group)) + 
  geom_rect(fill = 'lightgrey', colour = 'lightgrey', 
            xmin = 3, xmax = 4, ymin = -4, ymax = 7) +
  geom_point() + geom_errorbarh(aes(xmin = x - 1, xmax = x + 2), alpha  =  0.5) + 
  theme_bw()

test_that("error bars respect trace ordering", {
  L <- expect_doppelganger_built(fig1, "error-rect-alpha")
})